Case-hardening or carburization is the process of introducing carbon to the surface of a low-carbon iron, or more commonly a low-carbon steel object, to harden the surface. Iron which has a carbon content greater than ~0.02% is known as steel.
Case-hardening or carburization is the process of introducing carbon to the surface of a low-carbon iron, or more commonly a low-carbon steel object, to harden the surface. Iron which has a carbon content greater than ~0.02% is known as steel.
Source: Wikipedia "Case-hardening" · CC BY-SA 4.0
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